3. Choose Area of Interest Category
4. Draw the polygon on the grid
5 MB3 > Close
6. Give a Name and click OK
7. MB3 (Right Mouse Button) > Create Contours
8. In the Create Contour window > choose the grid > the range and click OK
9. The contour is created within the AOI polygon
10. If you want to create contour for the whole grid area, you can either delete the AOI in Interpretation Manager or MB3 (Right Mouse Button) on the AOI polygon > Area of Interest > Deactivate
11. Repeat Step #8
12. The contour is generated for the whole grid area